package nutella89.basic;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
//ctrl + shift + o 를 누르면 자동으로 연결

//import java.sql.*;

public class J21_BookDBDAO implements J20_BookDBService{
	
	// JDBC 접속정보
	private static final String DRV = "oracle.jdbc.OracleDriver";
	private static final String URL = "jdbc:oracle:thin:@//localhost:1521/xe";
	private static final String USR = "scott";
	private static final String PWD = "TIGER";
	
	// SQL문 정의
	private static final String insertSQL = " insert into bookdb(id,title,publisher,author) "
			+ " values(bookid.nextval,?,?,?) ";
	private static final String selectSQL = " select * from bookdb order by id desc ";
	private static final String selectoneSQL = " select * from bookdb where id=? ";
	private static final String updateSQL = " update bookdb set title=?,publisher=?,author=?, "
			+ " regdate=sysdate where id=? ";
	private static final String deleteSQL = " delete from bookdb where id=? ";
	
	
	@Override
	public int insertBookDB(J20_BookDBVO bvo) {
		Connection conn = null;
		PreparedStatement ps = null;
		int cnt = 0;
		
		try{
			Class.forName(DRV);
			conn = DriverManager.getConnection(URL, USR, PWD);
			ps = conn.prepareStatement(insertSQL);
				ps.setString(1, bvo.getTitle());
				ps.setString(2, bvo.getPublisher());
				ps.setString(3, bvo.getAuthor());
			cnt = ps.executeUpdate();
			
		}catch(Exception ex){
			ex.printStackTrace();
		}finally{
			if(ps!=null)
				try{ps.close();}catch(Exception e){}
			if(conn!=null)
				try{conn.close();}catch(Exception e){}
		}
		
		return cnt;
	}

	@Override
	public String selectBookDB() {
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;		// 추가됨!
		StringBuilder result = new StringBuilder();			// ArrayList로 변경예정
		
		try{
			Class.forName(DRV);
			conn= DriverManager.getConnection(URL, USR, PWD);
			ps = conn.prepareStatement(selectSQL);
			rs = ps.executeQuery();
			
			// select sql 실행 후 결과 처리
			while(rs.next()){
				for(int i=1;i<=5;++i){
					result.append(rs.getString(i)).append(" ");
					result.append("\n");
				}
			}
			
		}catch(Exception ex){
			ex.printStackTrace();
		}finally{
			if(rs!=null)
				try{rs.close();}catch(Exception e){}
			if(ps!=null)
				try{ps.close();}catch(Exception e){}
			if(conn!=null)
				try{conn.close();}catch(Exception e){}
		}
		
		return result.toString();
	}

	@Override
	public String selectBookDB(String id) {
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		StringBuilder result = new StringBuilder();
		
		try{
			Class.forName(DRV);
			conn = DriverManager.getConnection(URL, USR, PWD);
			ps = conn.prepareStatement(selectoneSQL);
				ps.setString(1, id);
			rs = ps.executeQuery();
			
			while(rs.next()){
				for(int i=1;i<=5;++i){
					result.append(rs.getString(i)).append(" ");
					result.append("\n");
				}
			}
			
		}catch(Exception ex){
			ex.printStackTrace();
		}finally{
			if(rs!=null)
				try{rs.close();}catch(Exception e){}
			if(ps!=null)
				try{ps.close();}catch(Exception e){}
			if(conn!=null)
				try{conn.close();}catch(Exception e){}
		}
		
		return result.toString();
	}

	@Override
	public int updateBookDB(J20_BookDBVO bvo) {
		Connection conn = null;
		PreparedStatement ps = null;
		int cnt = 0;
		
		try{
			Class.forName(DRV);
			conn = DriverManager.getConnection(URL, USR, PWD);
			ps = conn.prepareStatement(updateSQL);
				ps.setString(1, bvo.getTitle());
				ps.setString(2, bvo.getPublisher());
				ps.setString(3, bvo.getAuthor());
				ps.setString(4, bvo.getId());
			cnt = ps.executeUpdate();
		}catch(Exception ex){
			ex.printStackTrace();
		}finally{
			if(ps!=null)
				try{ps.close();}catch(Exception e){}
			if(conn!=null)
				try{conn.close();}catch(Exception e){}
		}
		
		return cnt;
	}

	@Override
	public int deleteBookDB(String id) {
		Connection conn = null;
		PreparedStatement ps = null;
		int cnt = 0;
		
		try{
			Class.forName(DRV);
			conn = DriverManager.getConnection(URL, USR, PWD);
			ps = conn.prepareStatement(deleteSQL);
				ps.setString(1, id);
			cnt = ps.executeUpdate();
		}catch(Exception ex){
			ex.printStackTrace();
		}finally{
			if(ps!=null)
				try{ps.close();}catch(Exception e){}
			if(conn!=null)
				try{conn.close();}catch(Exception e){}
		}
		
		return cnt;
	}
	
}
